Does anyone know any C++ program decompiler tool?
Appreciate anyone's help.
Am not sure,
may be you should try
I don't have much idea about that just redirecting you 
Decompilers are meant to create some semblance of code to allow users to maintain legacy code for which source does not exist. The real market for these products is in investigating hostile code, and recovering lost source code.
IDA Pro is possibly a good choice. It is not free, it is meant for businesses, mostly.
Boomerang is not a complete product - last time I looked.
IDA Pro Disassembler - multi-processor, windows hosted disassembler and debugger